Texas Instruments MSP430x4xx - Manual (Page 508)

Scan IF Registers
24-48 Scan IF
SIFCTL5, Scan IF Control Register 5
15 14 13 12 11 10 9 8
SIFCNT3x
rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)
7 6 5 4 3 2 1 0
SIFTSMRP SIFCLFQx SIFFNOM
SIFCLKG
ON
SIFCLKEN
rw−(0) rw−(1) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)
SIFCNT3x Bits
15-8 Internal oscillator counter. SIFCNT3 counts internal oscillator clock cycles
during one ACLK period when SIFFNOM = 0 or during four ACLK periods
when SIFFNOM = 1 after SIFCLKGON and SIFCLKEN are both set
SIFTSMRP Bit 7 TSM repeat mode
0
Each TSM sequence is triggered by the ACLK divider controlled with the
SIFDIV3Ax and SIFDIV3Bx bits.
1 Each TSM sequence is immediately started at the end of the previous
sequence.
SIFCLKFQx Bits
6-3 Internal oscillator frequency adjust. These bits are used to adjust the internal
oscillator frequency. Each increase or decrease of the SIFCLKFQx bits
increases or decreases the internal oscillator frequency by approximately 5%.
0000 Minimum frequency
:
1000 Nominal frequency
:
1111 Maximum frequency
SIFFNOM Bit 2 Internal oscillator nominal frequency
0
4 MHz
1 1 MHz
SIFCLKG
ON Bit 1 Internal oscillator control. When SIFCLKGON = 1 and SIFCLKEN = 1, the
internal oscillator calibration is started. SIFCLKGON is not used when
SIFCLKEN = 0.
0
No internal oscillator calibration is started.
1 The internal oscillator calibration is started when SIFCLKEN = 1.
SIFCLKEN Bit 0 Internal oscillator enable. This bit selects the high frequency clock source for
the TSM.
0
TSM high frequency clock source is SMCLK.
1 TSM high frequency clock source is the Scan IF internal oscillator.